TY - GEN
T1 - Calibration and characterization of self-powered floating-gate sensor arrays for long-term fatigue monitoring
AU - Lajnef, Nizar
AU - Chakrabartty, Shantanu
AU - Elvin, Niell G.
PY - 2008
Y1 - 2008
N2 - Measurement of cumulative loading statistics experienced by a structure is essential for monitoring long-term fatigue in biomechanical implants. However, the total power that can be harvested using typical in-vivo strain levels is less than 1μW. In this paper we characterize the performance of a silicon floating-gate injector array that can be used in conjunction with a piezoelectric transducer to facilitate long-term, battery-less fatigue monitoring. Measured results from a fabricated prototype in a 0.5μm CMOS process demonstrate that device can sense, compute and store loading statistics for over 70,000 of continuous simulated stress-strain cycles and this value can be increased beyond 107 by appropriate scaling of the system parameters. The measured results also show excellent agreement with its theoretical model and the nominal power dissipation of the array was measured to be less than 800nW.
AB - Measurement of cumulative loading statistics experienced by a structure is essential for monitoring long-term fatigue in biomechanical implants. However, the total power that can be harvested using typical in-vivo strain levels is less than 1μW. In this paper we characterize the performance of a silicon floating-gate injector array that can be used in conjunction with a piezoelectric transducer to facilitate long-term, battery-less fatigue monitoring. Measured results from a fabricated prototype in a 0.5μm CMOS process demonstrate that device can sense, compute and store loading statistics for over 70,000 of continuous simulated stress-strain cycles and this value can be increased beyond 107 by appropriate scaling of the system parameters. The measured results also show excellent agreement with its theoretical model and the nominal power dissipation of the array was measured to be less than 800nW.
UR - http://www.scopus.com/inward/record.url?scp=51749093093&partnerID=8YFLogxK
U2 - 10.1109/ISCAS.2008.4541613
DO - 10.1109/ISCAS.2008.4541613
M3 - Conference contribution
AN - SCOPUS:51749093093
SN - 9781424416844
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
SP - 1096
EP - 1099
BT - 2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008
T2 - 2008 IEEE International Symposium on Circuits and Systems, ISCAS 2008
Y2 - 18 May 2008 through 21 May 2008
ER -